From patchwork Tue Aug 10 08:48:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juri Lelli X-Patchwork-Id: 495525 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 611AFC4320A for ; Tue, 10 Aug 2021 08:48:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 40F8160F25 for ; Tue, 10 Aug 2021 08:48:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236828AbhHJIsv (ORCPT ); Tue, 10 Aug 2021 04:48:51 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:51680 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236814AbhHJIsv (ORCPT ); Tue, 10 Aug 2021 04:48:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628585309; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=PKUTk+76laugq4Cr2nwyksE4Heb04pD9E5SNbJNctsA=; b=UG6URQNx34V2H1IjPgI6xFkUJAf0uPlvfjWMOw8b1WXga4iVJ2j3pjbElit1Y3Ac4eRzdz zRqvz6WSM9zx7iDX/s3rlMmRadPU5/XUX+ka/fZ4D4yPFxJ65HAhbBEP1uYSIQg2ufZY2Y qghJV75Gyj+8NSdixBkcVOOcvKTUqRQ= Received: from mail-ej1-f70.google.com (mail-ej1-f70.google.com [209.85.218.70]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-49-S6ZFgY15O0ukzLUR3AnWJQ-1; Tue, 10 Aug 2021 04:48:28 -0400 X-MC-Unique: S6ZFgY15O0ukzLUR3AnWJQ-1 Received: by mail-ej1-f70.google.com with SMTP id ci25-20020a1709072679b029058e79f6c38aso5323062ejc.13 for ; Tue, 10 Aug 2021 01:48:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=PKUTk+76laugq4Cr2nwyksE4Heb04pD9E5SNbJNctsA=; b=jV5K69pv9MaurrSwQTweTiNDzeRm8S63duiXxW06ayoQRbEPPXb2O+jsW2mYoCek8s 4XY6nxfL8qKXLtbYgTcIJJC1GUzViabqyhr414U2tiz3Qo7kikn+JLp/V5+sifEm61kR n4Cf0EyUbL9fELsla2jaIMUd/XueipaKM7QvBnKJ6srHyO8hE7c6G+NzRQtAvKOhl/HY cTmtf3ekr9haiVuWO4TbeZ5XMGq18YpArYVz2QDLHeXUF6fcIxX0rjWYQAUDUTcifxW0 yDPNcoOj6YOYye4pthzDBgyekEGiNF2JA489W14Cxu5smqe+KbZapB+Gs9fVKNreYXte Xj5Q== X-Gm-Message-State: AOAM532ZE/OyIj9VFLG228ShxyqxaHssUuf8HQ3JM/czjju//b2zqNg0 Ejb/BJezWTgZAzJGxS5NkpBqtG3w3TsM/BS0Yn4FWwtxw0MCXtG9Z/KI6Mpc5o+i2Psyrs5zdzm nkHOHb9mMKZb4BkZgJo4gQgAF/9E= X-Received: by 2002:a17:906:cd02:: with SMTP id oz2mr1164208ejb.227.1628585307149; Tue, 10 Aug 2021 01:48:27 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyheDIpLjXKFM5u8jw6L0eI1kwX1Dc7r3iPjoVrOT6gQ4QtZ8X7tCUI7yirfMTRZQ9clwv1nQ== X-Received: by 2002:a17:906:cd02:: with SMTP id oz2mr1164195ejb.227.1628585306983; Tue, 10 Aug 2021 01:48:26 -0700 (PDT) Received: from localhost.localdomain.com ([151.29.52.108]) by smtp.gmail.com with ESMTPSA id la23sm6557667ejc.63.2021.08.10.01.48.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Aug 2021 01:48:26 -0700 (PDT) From: Juri Lelli To: paulmck@kernel.org, josh@joshtriplett.org Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org, peterz@infradead.org, bigeasy@linutronix.de, tglx@linutronix.de, rostedt@goodmis.org, mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com, joel@joelfernandes.org, rcu@vger.kernel.org, Juri Lelli Subject: [PATCH v2 0/2] rcu: Make rcu_normal_after_boot writable again Date: Tue, 10 Aug 2021 10:48:14 +0200 Message-Id: <20210810084816.155203-1-juri.lelli@redhat.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org Hi, v2 of a proposed RCU change to make rcu_normal_after_boot feature usable on PREEMPT_RT as well, as it turns out it's useful on RT as well on NO_HZ_FULL configurations. v2 gained an additional patch to revise rcu update module parameters permissions (as suggested during v1 review [1]). Changes wrt v1: - Restrict the option to !PREEMPT_RT || NO_HZ_FULL (Paul, Sebastian) - Change module params permissions (Paul) (02/02) Thanks, Juri v1 - https://lore.kernel.org/lkml/20210805080123.16320-1-juri.lelli@redhat.com/ Juri Lelli (2): rcu: Make rcu_normal_after_boot writable again rcu: Make rcu update module parameters world-readable kernel/rcu/tree_exp.h | 1 - kernel/rcu/update.c | 8 ++++---- 2 files changed, 4 insertions(+), 5 deletions(-)